For example,
"This is a sentence" should be the text of a label, a button will trigger this -
"e" should be replaced by "z",
"t" should be replaced by "b",
and "n" should be replaced by "d".
The text of the label after pressing the button should change to -
"bhis is a szdbzdcz"
I tried using the replace all text function but it only lets me put one letter in segment and replacement.